Off or OFF may refer to: Art and entertainment Off (video game), a video game by Mortis Ghost. Sven Väth, German DJ and singer who uses the pseudonym OFF Off (album), by Ciwan Haco, 2006 Off! (album
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6201272c06461bd5463e7e59571ad0a7329047e484e8c72f47096cbad94130. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50d0b544-28b3-48df-b2b1-79eaea584660.json and https://artists.proofprofile.net/proofs/artist/50d0b544-28b3-48df-b2b1-79eaea584660.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).